It’s kinda cool but £140 for a retro style tape player…really…sorry, it’s a no from me!
As above, mobile phone is much better, or if sea kayaking or whatever a Sansa/Sandisk ‘clip’ would surely be a better solution? You can get waterproof ones, and ones that support FLAC/lossless etc. for a lot less dosh than that, so it’s not such a burn if it gets trashed..